Full-automatic treatment device for deep denitrification of sewage/wastewater

Abstract

The invention relates to a full-automatic treatment device for deep denitrification of sewage / wastewater. The full-automatic treatment device comprises an automatic water inlet system, a Venturi oxygenation system and a nitrosation / ammoxidation biological denitrification system, a water inlet pipe in the automatic water inlet system is connected with a water inlet of a water storage tank, a hydraulic control valve is fixed in the water storage tank, the bottom of the valve is connected with a bottom water outlet of the water storage tank, and the bottom water outlet of the water storage tank is connected with the inlet end of an inverted-Y-shaped conveying pipe. The venturi oxygenation system comprises a venturi tube and an L-shaped water distribution tube; the biological purification system is divided into a nitrosation zone, a transition zone and an anaerobic ammonia oxidation zone by baffle plates, and biological fillers are arranged in all the zones. The device is mainly characterized in that a hydraulic control valve is designed according to the force balance principle to realize automatic quantitative water feeding of wastewater in the water storage tank, and air is sucked by the flow velocity generated by the high level difference when the wastewater flows through the Venturi tube to realize oxygen supply to microorganisms. The whole process is free of electric energy consumption, full-automatic operation can be achieved, and the operation and management cost can be reduced.

Description

technical field [0001] The invention belongs to the deep denitrification treatment of sewage / wastewater, and in particular relates to a fully automatic and energy-free sewage / wastewater automatic conveying, automatic oxygenation and biological denitrification treatment device. Background technique [0002] With the improvement of sewage discharge standards, my country's urban sewage treatment plants have more and more strict requirements on the nitrogen concentration in the effluent; and in the treatment of urban or rural black and odorous water bodies, ammonia nitrogen is also the only indicator that needs to be treated; In the definition of water body, when the ammonia nitrogen concentration is 8-15mg / L, it is mildly black and odorous; and when the ammonia nitrogen concentration is more than 15mg / L, it is severely black and odorous; according to the literature, the COD concentration in most black and odorous water bodies is generally Both are below 100mg / L, while the ammonia...

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Problems solved by technology

However, in the CANON process, the conversion of ammonia nitrogen in sewage / wastewater into nitrite nitrogen requires aeration and oxygenation; according to research, the common aeration devices in the market today include microporous aeration, mechanical aeration and jet aeration. Among them, microporous aeration and mechanical aeration are the most commonly used; microporous aeration is to supply air to the sewage through the blower, and the gas provided is divided into tiny bubbles at the diffusion device and enters the water body, and part of the oxygen is absorbed by the sewage in the sewage. Microbial absorption and utilization, the microporous aeration has a large air volume, the generated bubbles are small and the oxygen utilization rate is high, but there are problems such as relatively difficult management and maintenance, and it is not conducive to maintenance in rural areas; mechanical aeration refers to the use of mechanical equipment (such as blades, impellers, etc.) fully mix the sewage / wastewater and sludge in the activated sludge aeration tank, and continuously update the liquid level of the mixed liquid in contact with the air to increase the dissolved oxygen in the water. This aeration method does not require construction Blower room, simple equipment, fewer pipes and aeration heads to be laid, etc., but there are still defects such as high energy consumption, low adjustability, high operation and maintenance costs, and difficult maintenance

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